<template >

<div class="back" :style="back" >

 <div>
   <el-form :rules="rules"
            v-loading="loading"
            element-loading-text="正在登录..."
            element-loading-spinner="el-icon-loading"
            element-loading-background="rgba(0, 0, 0, 0.8)"
            ref="loginFrom"
            :model="loginFrom"
            class="loginContent">
     <h3 class="logintitle">系统登陆</h3>
     <el-form-item prop="username">
       <el-input type="text" v-model="loginFrom.username"   auto-complete="false" placeholder="请输入用户名"></el-input>
     </el-form-item>
     <el-form-item prop="password">
       <el-input type="password" v-model="loginFrom.password" auto-complete="false" placeholder="请输入密码"></el-input>
     </el-form-item>
     <el-form-item prop="code">
       <el-input type="text" v-model="loginFrom.code" auto-complete="false" placeholder="点击图片获取验证码" style="width: 250px;margin: 5px"> </el-input>
       <img :src="captchaUrl" @click="updateCaptcha">
     </el-form-item>
     <el-checkbox v-model="checked" class="loginRemember">记住我</el-checkbox>
     <el-button type="primary" style="width: 100%" @click="submitLogin">登录</el-button>

   </el-form>
 </div>
</div>
</template>
<script>


export default {
  name: "Login",
  data(){
    return{
      back:{
        backgroundImage: "url("+require("../assets/bb.jpg")+")",
        backgroundRepeat: "no-repeat",
        backgroundSize: "100% 100%",
        height: "100%",
        position: "fixed",
        width: "100%"
      },
      captchaUrl:'/captcha?time='+new Date(),
      loginFrom:{
        username:'admin',
        password: '123',
        code: ''
      },
      loading:false,
      checked: true,
      rules:{
        username:[{required:true,message:"请输入用户名",trigger:'blur'}],
        password:[{required:true,message:"请输入密码",trigger:'blur'}],
        code:[{required:true,message:"请输入验证码",trigger:'blur'}]
      }
    }
  },
  methods:{
    updateCaptcha(){
      this.captchaUrl='/captcha?time='+new Date()
    },
    submitLogin(){
      this.$refs.loginFrom.validate((valid) =>{
        if (valid){
          this.loading=true;
          this.postRequest('/login',this.loginFrom).then(resp=>{
            //判断resp是否存在
            if (resp){
              this.loading=false;
              //存储用户token
              const tokenStr = resp.obj.tokenHead+resp.obj.token;
              window.sessionStorage.setItem('tokenStr',tokenStr);
              //跳转首页
              this.$router.replace('/home');
            }

          })
        }else {
          this.$message.error('请输入所有字段')
          return false;
        }
      })
    }
  }
}
</script>

<style >

.logintitle{
  margin: 0px  auto 40px auto;
  text-align: center;
}
.loginContent{
  border-radius: 15px;
  background-clip: padding-box;
  margin: 180px auto;
  width: 350px;
  padding: 15px 35px 15px 35px;
  background: #c8fde5;
  border: 1px solid #eaeaea;
  box-shadow: 0 0 25px #cac6c6;
}
.loginRemember{
  text-align: left;
  margin: 0px 0px 15px 0px;
}
.el-form-item__content{
  display: flex;
  align-items: center;
}
</style>